Journal article
Phonation threshold pressure: A missing link in glottal aerodynamics
The Journal of the Acoustical Society of America, Vol.91(5), pp.2926-2935
05/01/1992
DOI: 10.1121/1.402928
PMID: 1629485
Abstract
Phonation threshold pressure has previously been defined as the minimum lung pressure required to initiate phonation. By modeling the dependence of this pressure on fundamental frequency, it is shown that relatively simple aerodynamic relations for time-varying flow in the glottis are obtained. Lung pressure and peak glottal flow are nearly linearly related, but not proportional. For this reason, traditional power law relations between vocal power and lung pressure may not hold. Glottal impendance for time-varying flow should be defined differentially rather than as a simple ratio between lung pressure and peak flow. It is shown that the peak flow, the peak flow derivative, the open quotient, and the speed quotient of inverse-filtered glottal flow waveforms all depend explicitly on phonation threshold pressure. Data from singers are compared with those from nonsingers. The primary difference is that singers obtain two to three times greater peak flow for a given lung pressure, suggesting that they adjust their glottal or vocal tract impedance for optimal flow transfer between the source and the resonantor.
Details
- Title: Subtitle
- Phonation threshold pressure: A missing link in glottal aerodynamics
- Creators
- Ingo R. Titze - University of Iowa
- Resource Type
- Journal article
- Publication Details
- The Journal of the Acoustical Society of America, Vol.91(5), pp.2926-2935
- DOI
- 10.1121/1.402928
- PMID
- 1629485
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Number of pages
- 10
- Language
- English
- Date published
- 05/01/1992
- Academic Unit
- School of Music; Communication Sciences and Disorders
- Record Identifier
- 9984719576202771
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